A system including at least one computerized device with voice command capability processed remotely includes a low power processor, executing a loose algorithmic model to recognize a wake word prefix in a voice command, the loose model having a low false rejection rate but suffering a high false acceptance rate, and a second processor which can operate in at least a low power/low clock rate mode and a high power/high clock rate mode. When the first processor determines the presence of the wake word, it causes the second processor to switch to the high power/high clock rate mode and to execute a tight algorithmic model to verify the presence of the wake word. By using the two processors in this manner, the average overall power required by the computerized device is reduced, as is the amount of waste heat generated by the system.
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2. The system of claim 1, wherein the at least one computerized device further includes an activity indicator, the activity indicator being operable to indicate when the second processor determines that the predefined wake word is present in the second buffer.
A system for voice-activated device control includes a primary processor and a secondary processor, each with dedicated memory buffers. The primary processor handles general computing tasks, while the secondary processor monitors audio input for a predefined wake word. The secondary processor continuously scans an audio buffer for the wake word, triggering device activation when detected. The system further includes an activity indicator, such as a light or display, that activates when the secondary processor identifies the wake word in its buffer. This indicator provides visual feedback to the user, confirming that the system has recognized the wake word and is ready for further voice commands. The secondary processor operates independently of the primary processor, ensuring low-latency wake word detection without interrupting primary computing tasks. The system is designed for devices requiring efficient, always-listening voice activation, such as smart assistants or hands-free computing systems. The activity indicator enhances user experience by providing immediate feedback, reducing uncertainty about system responsiveness. The secondary processor's dedicated buffer ensures reliable wake word detection even during high primary processor workloads.
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July 3, 2020
December 6, 2022
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